[Confluence Server] Migrating Spaces between two instances with NPE

[Dylan]

Dear community,

We are migrating a Confluence instance from 6.9.15 to 7.3.3 and we are facing an issue with the biggest space that is exported.

Indeed, this space is around 3Go big (attachments include). When importing it in the 7.3.3 instance, it fails at about 85-90% with an NPE (NullPointerException) as shown below.

We assumed it is an issue with the attachments that are not correctly imported and cause the failure.

We are looking for the best way to "split" the space in several pieces in order to improve the import process.

Some information:

• We tried importing the same XML archive in a. 6.9.15 instance and it also failed at the same point
• When exporting the file, we are sometimes facing a timeout issue for the this space that caused few errors during the processm which might be related to the import error

Questions:

1. Is it possible to export and import a space in several pieces? I don't mind using plugins such as BobSwift CLI
2. Is it possible to export the space without the attachments and import the attachments separately without having to re-create the entire attachment tree manually ?
3. Is there a way to modify the timeout delay when exporting a space ?
4. What would be the options in this particular case to handle correctly the migration between those two instances of Confluence?

2020-09-29 05:38:10,872 ERROR [Long running task: Importing data] [confluence.importexport.xmlimport.BackupImporter] importEntities Cannot import the entities:  -- url: /admin/restore-local-file.action | referer: http://10.1.21.139:8090/admin/backup.action | traceId: b36096253f60f5b4 | userName: admin | action: restore-local-file java.lang.NullPointerException     at com.atlassian.confluence.importexport.xmlimport.BackupImporter.doSpecialProcessing(BackupImporter.java:512)     at com.atlassian.confluence.importexport.xmlimport.BackupImporter.postProcess(BackupImporter.java:428)     at com.atlassian.confluence.importexport.xmlimport.BackupImporter.importEntities(BackupImporter.java:400)     at com.atlassian.confluence.importexport.xmlimport.BackupImporter.importEverything(BackupImporter.java:366)     at com.atlassian.confluence.importexport.xmlimport.FileBackupImporter.importEverything(FileBackupImporter.java:169)     at com.atlassian.confluence.importexport.xmlimport.BackupImporter$1.doInTransactionWithoutResult(BackupImporter.java:258)     at org.springframework.transaction.support.TransactionCallbackWithoutResult.doInTransaction(TransactionCallbackWithoutResult.java:34)     at com.atlassian.confluence.importexport.xmlimport.RestorePluginStateStoreTransactionCallbackDecorator.doInTransaction(RestorePluginStateStoreTransactionCallbackDecorator.java:46)     at com.atlassian.confluence.importexport.xmlimport.RestoreBandanaValuesTransactionCallbackDecorator.doInTransaction(RestoreBandanaValuesTransactionCallbackDecorator.java:50)     at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)     at com.atlassian.confluence.importexport.xmlimport.BackupImporter.doImportInternal(BackupImporter.java:220)     at com.atlassian.confluence.importexport.Importer.doImport(Importer.java:73)     at com.atlassian.confluence.importexport.DefaultImportExportManager.performImportInternal(DefaultImportExportManager.java:131)     at com.atlassian.confluence.importexport.DefaultImportExportManager.doPerformImport(DefaultImportExportManager.java:119)     at com.atlassian.confluence.importexport.DefaultImportExportManager.performImport(DefaultImportExportManager.java:114)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke(Method.java:498)     at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)     at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)     at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)     at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)     at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)     at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)     at com.sun.proxy.$Proxy219.performImport(Unknown Source)     at com.atlassian.confluence.importexport.actions.ImportLongRunningTask.runInternal(ImportLongRunningTask.java:58)     at com.atlassian.confluence.util.longrunning.ConfluenceAbstractLongRunningTask.run(ConfluenceAbstractLongRunningTask.java:26)     at com.atlassian.confluence.util.longrunning.ManagedTask.run(ManagedTask.java:52)     at com.atlassian.confluence.impl.util.concurrent.ConfluenceExecutors$ThreadLocalContextTaskWrapper.lambda$wrap$1(ConfluenceExecutors.java:90)     at com.atlassian.confluence.vcache.VCacheRequestContextOperations.lambda$doInRequestContext$0(VCacheRequestContextOperations.java:50)     at com.atlassian.confluence.impl.vcache.VCacheRequestContextManager.doInRequestContextInternal(VCacheRequestContextManager.java:87)     at com.atlassian.confluence.impl.vcache.VCacheRequestContextManager.doInRequestContext(VCacheRequestContextManager.java:71)     at com.atlassian.confluence.vcache.VCacheRequestContextOperations.doInRequestContext(VCacheRequestContextOperations.java:49)     at com.atlassian.confluence.vcache.VCacheRequestContextOperations.lambda$withRequestContext$2(VCacheRequestContextOperations.java:66)     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)     at java.util.concurrent.FutureTask.run(FutureTask.java:266)     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)     at java.lang.Thread.run(Thread.java:748) 2020-09-29 05:38:11,365 WARN [Long running task: Importing data] [confluence.impl.hibernate.ConfluenceHibernateTransactionManager] doRollback Performing rollback. Transactions:     [com.atlassian.confluence.importexport.DefaultImportExportManager.performImport]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (Session #1288780376)       ->[null]: PROPAGATION_REQUIRES_NEW,ISOLATION_DEFAULT (Session #1492895371)  -- url: /admin/restore-local-file.action | referer: http://10.1.21.139:8090/admin/backup.action | traceId: b36096253f60f5b4 | userName: admin | action: restore-local-file 2020-09-29 05:38:14,929 ERROR [Long running task: Importing data] [confluence.importexport.actions.ImportLongRunningTask] runInternal Failure during import  -- url: /admin/restore-local-file.action | referer: http://10.1.21.139:8090/admin/backup.action | traceId: b36096253f60f5b4 | userName: admin | action: restore-local-file com.atlassian.confluence.importexport.ImportExportException: java.lang.NullPointerException     at com.atlassian.confluence.importexport.xmlimport.BackupImporter.importEntities(BackupImporter.java:405)     at com.atlassian.confluence.importexport.xmlimport.BackupImporter.importEverything(BackupImporter.java:366)     at com.atlassian.confluence.importexport.xmlimport.FileBackupImporter.importEverything(FileBackupImporter.java:169)     at com.atlassian.confluence.importexport.xmlimport.BackupImporter$1.doInTransactionWithoutResult(BackupImporter.java:258)     at org.springframework.transaction.support.TransactionCallbackWithoutResult.doInTransaction(TransactionCallbackWithoutResult.java:34)     at com.atlassian.confluence.importexport.xmlimport.RestorePluginStateStoreTransactionCallbackDecorator.doInTransaction(RestorePluginStateStoreTransactionCallbackDecorator.java:46)     at com.atlassian.confluence.importexport.xmlimport.RestoreBandanaValuesTransactionCallbackDecorator.doInTransaction(RestoreBandanaValuesTransactionCallbackDecorator.java:50)     at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)     at com.atlassian.confluence.importexport.xmlimport.BackupImporter.doImportInternal(BackupImporter.java:220)     at com.atlassian.confluence.importexport.Importer.doImport(Importer.java:73)     at com.atlassian.confluence.importexport.DefaultImportExportManager.performImportInternal(DefaultImportExportManager.java:131)     at com.atlassian.confluence.importexport.DefaultImportExportManager.doPerformImport(DefaultImportExportManager.java:119)     at com.atlassian.confluence.importexport.DefaultImportExportManager.performImport(DefaultImportExportManager.java:114)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)     at java.lang.reflect.Method.invoke(Method.java:498)     at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)     at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)     at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)     at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)     at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)     at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)     at com.sun.proxy.$Proxy219.performImport(Unknown Source)     at com.atlassian.confluence.importexport.actions.ImportLongRunningTask.runInternal(ImportLongRunningTask.java:58)     at com.atlassian.confluence.util.longrunning.ConfluenceAbstractLongRunningTask.run(ConfluenceAbstractLongRunningTask.java:26)     at com.atlassian.confluence.util.longrunning.ManagedTask.run(ManagedTask.java:52)     at com.atlassian.confluence.impl.util.concurrent.ConfluenceExecutors$ThreadLocalContextTaskWrapper.lambda$wrap$1(ConfluenceExecutors.java:90)     at com.atlassian.confluence.vcache.VCacheRequestContextOperations.lambda$doInRequestContext$0(VCacheRequestContextOperations.java:50)     at com.atlassian.confluence.impl.vcache.VCacheRequestContextManager.doInRequestContextInternal(VCacheRequestContextManager.java:87)     at com.atlassian.confluence.impl.vcache.VCacheRequestContextManager.doInRequestContext(VCacheRequestContextManager.java:71)     at com.atlassian.confluence.vcache.VCacheRequestContextOperations.doInRequestContext(VCacheRequestContextOperations.java:49)     at com.atlassian.confluence.vcache.VCacheRequestContextOperations.lambda$withRequestContext$2(VCacheRequestContextOperations.java:66)     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)     at java.util.concurrent.FutureTask.run(FutureTask.java:266)     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)     at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.NullPointerException     at com.atlassian.confluence.importexport.xmlimport.BackupImporter.doSpecialProcessing(BackupImporter.java:512)     at com.atlassian.confluence.importexport.xmlimport.BackupImporter.postProcess(BackupImporter.java:428)     at com.atlassian.confluence.importexport.xmlimport.BackupImporter.importEntities(BackupImporter.java:400)     ... 39 more

Many thanks for the support,

Dylan